<!DOCTYPE html>
<html>
  <svg width="200" height="200">
    <defs>
      <pattern id="pattern-id" x="0" y="0" patternUnits="userSpaceOnUse" height="200" width="200">
      <rect width="200" height="200" style="fill:rgb(0,0,255)" />
      </pattern>
    </defs>
    <circle id="circle" cx="101" cy="101" r="50" fill="url(#pattern-id)" stroke="#000"/>
  </svg>
</html>
